i already have one of these, but its starting to die, so i decided to make my own.
Step 1: Case
i needed something cylindrical and after experimenting around i decided on 3 basic criteria:
1 again, it had to be cylindrical.
2 it had to be re-close able.
3 it had to be lying around the house somewhere.
a film canister was close but just a little bit too small, and i finally decided on an empty pill bottle.
Step 2: The stuff
you need a case
9v adapter thing...
old pcb or strip board.
10k ohm resistor (i salvaged mine from another old pcb)
Step 3: A clean work surface...
ya even i will admit its a bit of a mess...
Step 4: Circutry
its more difficult but you can use an old piece of PCB if its free of copper coating, and yes strip board does work better
Step 5: Schematic
very basic, shouldn't be too hard to follow...
Step 6: LED's
the one i showed in the parts picture i use all the time and i wasn't sure i wanted to give it up, and then i found a few old laser pointer things that had a little light on them, i saved these, the battery's where dead so my teacher was throwing them away!
Step 7: Soldering
i made my own holder thing and it works quite well, i don't always use the tweasers though
Step 8: Drill and fit...
i used a 1/2 inch drill bit to make a hole, and then cleaned it up with a razor blade.
Step 9: Hot glue
before you commit to anything solder the wire leads to the battery clip,then hot glue the circuit board in
Step 10: Head gear
for some strange reason girls like to do there hair, even more of a mystery is why they do it in the boys bathroom, granted there's a bigger mirror but still...
those little hair band thingy's make great high durability rubber bands.
apparently they all have specific names for there's sizes! i don't think i will ever understand women